How to uninstall Media Player 11:
Go to the add / remove programs in control panel.
If you're using XP SP2, you'll see a 'show updates' box at the top of the add / remove programs. Turn it on.
Select "Windows Media Player 11".
OR
Click the START button and select Run.Type in: regedit in the command box.
When the regedit window appears, expand the HKEY LOCAL MACHINE by clicking on the plus sign to its right.
Now Click on the plus next to SOFTWARE, then MICROSOFT, then WINDOWS, then CURRENT VERSION and finally UNINSTALL
When you expand the Uninstall folder, you'll see all the programs currently installed, such as the uninstall Windows Media Player or etc.
Click on the folder you want to uninstall, in the box on the right you will see five strings:
DisplayIcon, DisplayName, ParentDisplayName, ParentKeyName and UninstallString.
Double click UninstallString and a box will appear with the uninstall string highlighted.
Right click on the highlighted entry and select COPY.
Close the Regedit window.Select the START button and click RUN.
Right click inside the command box and paste the uninstall string and click OK to uninstall Media Player 11.